WO2000076023A1 - Flat-plate monopole antennae - Google Patents
Flat-plate monopole antennae Download PDFInfo
- Publication number
- WO2000076023A1 WO2000076023A1 PCT/CA2000/000635 CA0000635W WO0076023A1 WO 2000076023 A1 WO2000076023 A1 WO 2000076023A1 CA 0000635 W CA0000635 W CA 0000635W WO 0076023 A1 WO0076023 A1 WO 0076023A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- radiating plate
- wireless communications
- communications device
- ground plane
- antennae
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
- H01Q9/32—Vertical arrangement of element
- H01Q9/38—Vertical arrangement of element with counterpoise
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
- H01Q9/32—Vertical arrangement of element
- H01Q9/36—Vertical arrangement of element with top loading
Definitions
- the present invention relates to a flat-plate antennae.
- the present invention relates to a flat-plate monopole antennae suitable for use with mobile wireless communications devices.
- the conventional cellular monopole antennae comprises a tubular antennae element grounded to the casing of the cellular telephone, and a metal rod disposed within the grounded tubular antennae element.
- the monopole antennae must generally be considerably longer than the length of the casing of the cellular telephone. Since a long monopole antennae would inhibit the portability of the cellular telephone, the monopole antennae is typically fabricated as a series of telescoping monopole antennae sections which allow the monopole antennae to be retracted into the telephone casing when the cellular telephone is not in use. However, the monopole antennae must still be extended to obtain the required gain and bandwidth characteristics for cellular communication. Accordingly, attempts have been made to reduce the size of the monopole antennae without compromising antennae gain and bandwidth.
- Yokoyama US 4,791,423 teaches a microstrip antennae suitable for use with a mobile telephone.
- the microstrip antennae comprises a first grounding rectangular conductive sheet, a radiating rectangular conductive sheet parallel to the grounding conductive sheet, a feed pin disposed within the substrate between the first grounding conductive sheet and the radiating conductive sheet, and second and third grounding conductive sheets disposed at opposite ends of the first grounding conductive sheet and being perpendicular to the first grounding conductive sheet and the radiating conductive sheet sleeve so as to improve the beam tilt characteristics of the antennae.
- the second grounding conductive sheet functions as a connecting conductive sheet connecting the first grounding conductive sheet to the radiating conductive sheet.
- the patch antennae includes a planar passive element disposed above and in close proximity to the radiating conductive sheet for facilitating impedance matching of the antennae.
- Nakase US 5,061,939
- the flat-plate antennae comprises a rectangular conductive ground plate, a radiating oval-shaped conductive top plate parallel to the ground plate, a plurality of elongated connecting members disposed between the ground plate and the top plate for electrically connecting the top plate to the ground plate, and a stripline resonator disposed between the ground plate and the top plate.
- the stripline resonator includes a feeder line, and a capacitor electrode centrally disposed below the top plate for adjusting the resonant frequency of the antennae.
- Yokoyama (US 5,148,181) teaches a mobile radio communications device having an antennae for preventing the antennae gain from being reduced by the user's head and/or hands during operation of the communications device.
- the antennae is mounted on the upper surface of the casing of the communications device, and comprises a rectangular first conductive plate, a rectangular second conductive plate disposed below and extending parallel to the first conductive plate, and a rectangular third conductive plate extending perpendicularly from the first and second conductive plates.
- the first conductive plate is spaced a distance from the upper surface of the casing of the communications device.
- the antennae also includes a short circuit plate extending perpendicularly from the first conductive plate and is connected to the upper surface of the casing in proximity to the location of the earpiece and the mouthpiece.
- Yokoyama and Nakase all provide an antennae which is significantly smaller in size than the conventional telescoping monopole antennae.
- the bandwidth, resonant frequency and input impedance characteristics of the antennae are dictated by fixed parameters such as the dimensions of the conductive plates, and by the separation distance between the conductive plates.
- close attention must be paid to manufacturing tolerances to attain the proper operating characteristics of the monopole antennae. Therefore, there remains a need for a monopole antennae which is significantly smaller than the conventional monopole telescoping antennae, and whose operating characteristics are not compromised by variations from manufacturing tolerances.
- the monopole antenna includes a conductive ground plane, a conductive radiating plate, an antennae interface terminal, and a resonant network for defining operating characteristics of the antennae.
- the conductive radiating plate is spaced apart from the ground plane and, together with the ground plane, defines a cavity therebetween.
- the antennae interface terminal is in communication with the cavity and is electrically isolated from the ground plane and the radiating plate.
- the resonant network includes an inductive element electrically coupled between the interface terminal and the radiating plate.
- the wireless communications device includes a conductive casing for receiving wireless communications hardware therein; a conductive radiating plate spaced apart from the casing and, together with the ground plane, defining an antenna; and a resonant network for defining operating characteristics of the antennae.
- the conductive casing includes an antenna communication port for interfacing with the communications hardware.
- the resonant network includes an inductive element electrically coupled between the communication port and the radiating plate.
- the inductive element is disposed within the cavity and comprises a first air-core coiled wire inductor electrically coupled between the radiating plate and the interface terminal, and a second air-core coiled wire inductor electrically coupled between the interface terminal and the ground plane.
- Each inductor has a number of wire turns, and the resonant network provides the antenna with a resonant frequency determined in accordance with the number of wire turns.
- Fig. 1 is a perspective view of the wireless communications device, according to the present invention, depicting the conductive casing (antenna ground plane), the radiating plate, and the resonant network;
- Fig. 2 is a magnified view of the top end of the wireless communications device shown in Fig. 1, depicting the air-cored coiled wire inductors of the resonant network , ;
- Fig. 3 is a longitudinal cross-sectional view of one variation of the wireless communications device, including an arcuately-shaped radiating plate;
- Fig. 4 is a side view of another variation of the wireless communications device, including a radiating plate inclined relative to the conductive casing;
- Fig. 5 a is a schematic view of the wireless communications device including dimensional symbols as used herein;
- Fig. 5b is a magnified schematic view of the top end of the wireless communications device including additional dimensional symbols as used herein.
- a wireless communications device denoted generally as 100, comprising a conductive casing 102, a conductive radiating plate 104 spaced apart from the casing 102, and a cavity 106 defined between the casing 102 and the radiating plate 104.
- the casing 102 has a generally rectangular parallelopiped shape, configured for receiving wireless communications circuitry therein, and includes a pair of opposite faces 108a, 108b, a pair of opposite sides
- the casing 102 is shaped as a wireless telephone handset, and the wireless communications circuitry housed within the casing 102 operates as a wireless telephone.
- the casing 102 may adopt other shapes and the wireless communications circuitry may function other than as a wireless telephone, as the application demands.
- the casing 102 includes an antenna communication port 114, and an antenna interface terminal 116 extending through the communication port 114.
- the interface terminal 116 extends into the cavity 106, and is electrically isolated from the casing 102 and the radiating plate 104.
- the interface terminal 116 interfaces with the communications hardware disposed within the casing 102, and allows the communications hardware to transmit and receive data as electromagnetic waves.
- the radiating plate 104 cooperates with the casing 102 to define a monopole antenna, with the casing 102 acting as the conductive ground plane for the antenna.
- the radiating plate 104 comprises a rectangular planar conductive plate fabricated from copper or aluminum.
- the radiating plate 104 may adopt any other shape suitable for proper antenna operation.
- the radiating plate is fabricated with an arcuate shape.
- the radiation plate 104 may have the same or different dimensions as the casing 102.
- the radiating plate 104 is oriented substantially parallel to the casing ends 112 and at right angles to the casing faces 108.
- the radiating plate 104 may also be disposed at other angles relative to the casing faces 108 so as to alter the antenna pattern of the monopole antenna.
- a wireless communications device 100' in which the end 112a' and the radiating plate 104 are inclined relative to the casing faces 108.
- the radiating plate 104 may be inclined slightly with respect to the casing end 112a.
- the wireless communication device 100 also includes a resonant network 118 which, in conjunction with the dimensions of the radiating plate 104 and the cavity 106, defines the operating characteristics of the monopole antennae.
- the resonant network 118 is disposed within the cavity 106, and includes an inductive antenna element electrically coupled to the interface terminal 116, the radiating plate 104 and the casing 102.
- the resonant network 118 is not limited to including only a single inductive antenna element.
- the resonant network 118 includes a plurality of distinct inductive antenna elements, each being electrically connected to the interface terminal 116 and respective locations on the radiating plate 104 and the casing 102
- the inductive antenna element comprises a first inductor 120 electrically connected between the radiating plate 104 and the interface terminal 116, and a second inductor 122 electrically connected between the interface terminal 116 and the casing 102.
- the first inductor 120 and the second inductor 122 are coupled together on a common core.
- the resonant network 118 also includes a capacitive antenna element which is defined by the dimensions of the casing 102, the radiating plate 104 and the cavity 106.
- the inductive antenna element is disposed in parallel with the capacitive antenna element, with the capacitive antenna element and the inductive antenna element together establishing a parallel resonant circuit.
- the resonant frequency of the monopole antenna is determined in accordance with the capacitance of the capacitive antenna element and the inductance of the inductive antenna element.
- the cavity 106 comprises an air cavity
- the inductors 120, 122 comprise air-cored coiled wire inductors, each having a respective number of wire turns so that the resonant frequency of the monopole antenna is defined by the number of wire turns of each inductor 120, 122.
- the cavity 106 may include a dielectric or a support structure which supports the radiating plate 104.
- the wire used in the wire inductors 120, 122 comprises flexible wire so as to allow the distance between the radiating plate 104 and the end 112a (and therefore the capacitance of the capacitive antenna element) to be adjusted. In this manner, the resonant frequency of the monopole antenna can be adjusted to account for variations in manufacturing tolerances.
- the input impedance of the monopole antenna is dictated by the number of wire turns (and hence the inductances) of the wire inductors 120, 122.
- the capacitance of the capacitive antenna element is dictated by the size and shape of the radiation plate 104 and the casing 102. Accordingly, the present invention offers the significant advantage of allowing the input impedance of the monopole antennae to be matched to that of the wireless communications circuitry by adjusting the number of wire turns, while also allowing the resonant frequency and bandwidth of the antenna to be adjusted as desired by altering the dimensions of the radiation plate 104 and/or the casing 102. In each case, however, preferably the length and width of the radiation plate 104 and the end 112a remains less than 10% of the operating wavelength of the antenna at the resonant frequency.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Details Of Aerials (AREA)
- Support Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Waveguide Aerials (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002373768A CA2373768A1 (en) | 1999-06-02 | 2000-06-02 | Flat-plate monopole antennae |
KR1020017015540A KR20020015694A (en) | 1999-06-02 | 2000-06-02 | Flat-plate monopole antennae |
AU53773/00A AU5377300A (en) | 1999-06-02 | 2000-06-02 | Flat-plate monopole antennae |
JP2001502194A JP2003501926A (en) | 1999-06-02 | 2000-06-02 | Flat plate monopole antenna |
AT00938358T ATE233959T1 (en) | 1999-06-02 | 2000-06-02 | FLAT MONOPOLE ANTENNA |
DE60001571T DE60001571T2 (en) | 1999-06-02 | 2000-06-02 | Flat monopole antenna |
EP00938358A EP1188200B1 (en) | 1999-06-02 | 2000-06-02 | Flat-plate monopole antennae |
US09/998,796 US20020113740A1 (en) | 1999-06-01 | 2001-12-03 | Flat-plate monopole antennae |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13751099P | 1999-06-02 | 1999-06-02 | |
US60/137,510 | 1999-06-02 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/998,796 Continuation US20020113740A1 (en) | 1999-06-01 | 2001-12-03 | Flat-plate monopole antennae |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000076023A1 true WO2000076023A1 (en) | 2000-12-14 |
Family
ID=22477753
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CA2000/000635 WO2000076023A1 (en) | 1999-06-01 | 2000-06-02 | Flat-plate monopole antennae |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP1188200B1 (en) |
JP (1) | JP2003501926A (en) |
KR (1) | KR20020015694A (en) |
AT (1) | ATE233959T1 (en) |
AU (1) | AU5377300A (en) |
CA (1) | CA2373768A1 (en) |
DE (1) | DE60001571T2 (en) |
WO (1) | WO2000076023A1 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002013306A1 (en) * | 2000-08-08 | 2002-02-14 | Koninklijke Philips Electronics N.V. | Wireless terminal |
WO2002095868A1 (en) * | 2001-05-19 | 2002-11-28 | Koninklijke Philips Electronics N.V. | Antenna arrangement |
KR100449428B1 (en) * | 2001-12-26 | 2004-09-18 | 한국전자통신연구원 | a monopole antenna having an elliptic cylinder-type radiating body |
EP1665461A1 (en) * | 2003-09-08 | 2006-06-07 | Samsung Electronics Co., Ltd. | Electromagnetically coupled small broadband monopole antenna |
US8203492B2 (en) | 2008-08-04 | 2012-06-19 | Fractus, S.A. | Antennaless wireless device |
US8237615B2 (en) | 2008-08-04 | 2012-08-07 | Fractus, S.A. | Antennaless wireless device capable of operation in multiple frequency regions |
RU2486644C1 (en) * | 2012-02-03 | 2013-06-27 | Открытое акционерное общество "Научно-исследовательский институт космического приборостроения" (ОАО "НИИ КП") | Aircraft antenna |
US8952855B2 (en) | 2010-08-03 | 2015-02-10 | Fractus, S.A. | Wireless device capable of multiband MIMO operation |
US9147929B2 (en) | 2010-02-02 | 2015-09-29 | Fractus, S.A. | Antennaless wireless device comprising one or more bodies |
WO2018180839A1 (en) * | 2017-03-29 | 2018-10-04 | 株式会社ヨコオ | Antenna device |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10303456A1 (en) * | 2003-01-29 | 2004-08-19 | Fujitsu Siemens Computers Gmbh | Electric device |
KR100744810B1 (en) * | 2005-07-23 | 2007-08-01 | 엘지전자 주식회사 | Ultra wide band antenna of patch type |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4491843A (en) * | 1981-01-23 | 1985-01-01 | Thomson-Csf | Portable receiver with housing serving as a dipole antenna |
-
2000
- 2000-06-02 WO PCT/CA2000/000635 patent/WO2000076023A1/en not_active Application Discontinuation
- 2000-06-02 JP JP2001502194A patent/JP2003501926A/en active Pending
- 2000-06-02 DE DE60001571T patent/DE60001571T2/en not_active Expired - Fee Related
- 2000-06-02 EP EP00938358A patent/EP1188200B1/en not_active Expired - Lifetime
- 2000-06-02 AU AU53773/00A patent/AU5377300A/en not_active Abandoned
- 2000-06-02 CA CA002373768A patent/CA2373768A1/en not_active Abandoned
- 2000-06-02 KR KR1020017015540A patent/KR20020015694A/en not_active Application Discontinuation
- 2000-06-02 AT AT00938358T patent/ATE233959T1/en not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4491843A (en) * | 1981-01-23 | 1985-01-01 | Thomson-Csf | Portable receiver with housing serving as a dipole antenna |
Non-Patent Citations (1)
Title |
---|
DELAVEAUD C ET AL: "SMALL-SIZED LOW-PROFILE ANTENNA TO REPLACE MONOPOLE ANTENNAS", ELECTRONICS LETTERS,GB,IEE STEVENAGE, vol. 34, no. 8, 16 April 1998 (1998-04-16), pages 716 - 717, XP000781422, ISSN: 0013-5194 * |
Cited By (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002013306A1 (en) * | 2000-08-08 | 2002-02-14 | Koninklijke Philips Electronics N.V. | Wireless terminal |
WO2002095868A1 (en) * | 2001-05-19 | 2002-11-28 | Koninklijke Philips Electronics N.V. | Antenna arrangement |
US6795027B2 (en) | 2001-05-19 | 2004-09-21 | Koninklijke Philips Electronics N.V. | Antenna arrangement |
KR100905340B1 (en) | 2001-05-19 | 2009-07-01 | 엔엑스피 비 브이 | Antenna arrangement |
KR100449428B1 (en) * | 2001-12-26 | 2004-09-18 | 한국전자통신연구원 | a monopole antenna having an elliptic cylinder-type radiating body |
EP1665461A1 (en) * | 2003-09-08 | 2006-06-07 | Samsung Electronics Co., Ltd. | Electromagnetically coupled small broadband monopole antenna |
EP1665461A4 (en) * | 2003-09-08 | 2006-10-04 | Samsung Electronics Co Ltd | Electromagnetically coupled small broadband monopole antenna |
US7215288B2 (en) | 2003-09-08 | 2007-05-08 | Samsung Electronics Co., Ltd. | Electromagnetically coupled small broadband monopole antenna |
US9130259B2 (en) | 2008-08-04 | 2015-09-08 | Fractus, S.A. | Antennaless wireless device |
US9960490B2 (en) | 2008-08-04 | 2018-05-01 | Fractus Antennas, S.L. | Antennaless wireless device capable of operation in multiple frequency regions |
US11557827B2 (en) | 2008-08-04 | 2023-01-17 | Ignion, S.L. | Antennaless wireless device |
US8736497B2 (en) | 2008-08-04 | 2014-05-27 | Fractus, S.A. | Antennaless wireless device capable of operation in multiple frequency regions |
US11183761B2 (en) | 2008-08-04 | 2021-11-23 | Ignion, S.L. | Antennaless wireless device capable of operation in multiple frequency regions |
US11139574B2 (en) | 2008-08-04 | 2021-10-05 | Ignion, S.L. | Antennaless wireless device |
US8203492B2 (en) | 2008-08-04 | 2012-06-19 | Fractus, S.A. | Antennaless wireless device |
US10763585B2 (en) | 2008-08-04 | 2020-09-01 | Fractus Antennas, S.L. | Antennaless wireless device capable of operation in multiple frequency regions |
US9276307B2 (en) | 2008-08-04 | 2016-03-01 | Fractus Antennas, S.L. | Antennaless wireless device |
US9350070B2 (en) | 2008-08-04 | 2016-05-24 | Fractus Antennas, S.L. | Antennaless wireless device capable of operation in multiple frequency regions |
US9761944B2 (en) | 2008-08-04 | 2017-09-12 | Fractus Antennas, S.L. | Antennaless wireless device |
US8237615B2 (en) | 2008-08-04 | 2012-08-07 | Fractus, S.A. | Antennaless wireless device capable of operation in multiple frequency regions |
US10734724B2 (en) | 2008-08-04 | 2020-08-04 | Fractus Antennas, S.L. | Antennaless wireless device |
US10249952B2 (en) | 2008-08-04 | 2019-04-02 | Fractus Antennas, S.L. | Antennaless wireless device capable of operation in multiple frequency regions |
US9147929B2 (en) | 2010-02-02 | 2015-09-29 | Fractus, S.A. | Antennaless wireless device comprising one or more bodies |
US9997841B2 (en) | 2010-08-03 | 2018-06-12 | Fractus Antennas, S.L. | Wireless device capable of multiband MIMO operation |
US9112284B2 (en) | 2010-08-03 | 2015-08-18 | Fractus, S.A. | Wireless device capable of multiband MIMO operation |
US8952855B2 (en) | 2010-08-03 | 2015-02-10 | Fractus, S.A. | Wireless device capable of multiband MIMO operation |
RU2486644C1 (en) * | 2012-02-03 | 2013-06-27 | Открытое акционерное общество "Научно-исследовательский институт космического приборостроения" (ОАО "НИИ КП") | Aircraft antenna |
WO2018180839A1 (en) * | 2017-03-29 | 2018-10-04 | 株式会社ヨコオ | Antenna device |
US11502409B2 (en) | 2017-03-29 | 2022-11-15 | Yokowo Co., Ltd. | Antenna device |
Also Published As
Publication number | Publication date |
---|---|
AU5377300A (en) | 2000-12-28 |
ATE233959T1 (en) | 2003-03-15 |
DE60001571D1 (en) | 2003-04-10 |
CA2373768A1 (en) | 2000-12-14 |
JP2003501926A (en) | 2003-01-14 |
DE60001571T2 (en) | 2003-09-25 |
KR20020015694A (en) | 2002-02-28 |
EP1188200B1 (en) | 2003-03-05 |
EP1188200A1 (en) | 2002-03-20 |
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